I'm trying to convert an UIimage to byte array in swift . I've searched a lot but the solutions are either too old ( for swift 2 ) or they don't work . Does anyone know a way to do so ?! Thanks
Solution above is incorrect, extremely slow to copy byte per byte It took 4 seconds for a big image, and 0.02s with the following (new constructor from Swift3)
let data: [UInt8] = [...]
let image = UIImage(data: Data(bytes: data, count: data.count))
guard let dataPng: Data = image.pngData() else { return [] }
let finalData = [UInt8](dataPng)
Try this!!
guard let image = UIImage(named: "someImage") else { return }
let data = UIImageJPEGRepresentation(image, 1.0)
OR you can convert UIImage to NSData
func getArrayOfBytesFromImage(imageData:NSData) -> NSMutableArray
{
// the number of elements:
let count = data.length / MemoryLayout<UInt8>.size
// create array of appropriate length:
var bytes = [UInt8](repeating: 0, count: count)
// copy bytes into array
imageData.getBytes(&bytes, length:count)
var byteArray:NSMutableArray = NSMutableArray()
for (var i = 0; i < count; i++) {
byteArray.addObject(NSNumber(unsignedChar: bytes[i]))
}
return byteArray
}
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